Stop motion



E. HAMEL STOP MOTION sept. 6, 1960 5 Sheets-Sheet l Filed Sept. 24, 1958 INVENTOR.

/ ,Inr11'11111111111111111111",O g l l l 5 l n ATTORNEY Sept 6, A1960 E. HAMEL 2,951,331

STOP MOTION Filed Sept. 24, 1958 3 Sheets-Sheet 2 INVENTOR.

EDMUND HAMEL ATTORNEY E. HAMEL STOP MOTIO Sept. 6, 1960 5 Sheets-Sheet 3 Filed Sept. 24, 1958 INVENTOR.

HAMEL D N U M D E AT TORNE Y This invention relates to improvements in twisting frames and more particularly to an individual stop` motion element in operative engagement with the individual threads being twisted. f

One of the objects tot the present invention is to provide an individual stop motion element for each individual thread being processed in a twisting frame.

Another object of the present invention is to provide instantaneous stopping of the thread supply to a twisting spindle upon -thread breakage without interfering with the operation of the other twisting spindles.

Andstill another object of the present invention is Ito provide a stop motion for a twisting frame which is more eicient in operation, less costly to manufacture and maintain. and which upon thread breakage saves thread and the operative time to repair the break.

The present invention is directed to twisting frames of the type having a driving lower roller anda driven upper roller which may be placed in one of Ithree positions on a bracket arm. One position is the temporary storage position. The second-position is the inoperative or nonworking position. The third position is the lower roller engagement, driven or working position. A thread is drawn between the upper and lower roller inpassing from va source of supply to a twisting spindle.

According to the invention, the stop motion element is a segmental member pivotally mounted in a manner to be under the influence and control of the running thread.- Upon thread breakage, the stop motion element will be subjected to movement created by its mass being eccentrically disposed with respect to its pivot. The stop motion element will engage and move the upper drivenV roller from drive contact with the lower driving roller and thereby cease drawing the thread from the source of supply in its passage to the twisting spindle.

Other objects of the present invention Will become apparent in part and be pointed out in part in the following specification and claims.

In the accompanying ydrawings wherein like reference characters refer to like parts:

Figure 1 is a schematic transverse cross sectional view through a twisting frame showing the operating position or work performing condition of the several parts.

Figure 2 is a view similar to Figure l showing the position of the stop motion member when thread breakage occurs.

Figure 3 is a view similar to Figure 2 showing the position of the top roller after it has been lifted away from the bottom roller by the stop motion member.

Figure 4 is a schematic transverse cross sectional view, enlarged, of the stop motion member.

Figure 5 is a view similar to Figure 1 showing theV construction of a modified form of thread eyelet with thread delivery through kthe upper eyelet.

Figure 6 is a ViewY similar to Figure 5 with thread delivery through the lower eyelet.

vReferring to the drawings, 1 designates the driven botlugs 6 engage and are frictionally driven by bottom roller' arent tom roller of a conventional type twisting frame. 'A plu 70 rality of top rollers 2, one for each twisting spindle, are provided on opposite sides with trunnions 3. A plurality f 4'2,951,331 C@ t latented Sept.- 6, 1.960A

of fixed rails 5 are secured to the machine frame. There are two rails 5, for and on either side of top rollers 2. Rails 5 are provided withV upwardly inclined surfaces 4 having outboard lugs 6 and inboard lugs 7 terminating the opposite ends of inclined surfaces 4. Trunnions 3 are rotatively mounted upon inclined surface 4. Rails 5 are provided with notches 8, into which the trunnions 3 are manually positioned ywhen an upper roller 2 is placed -in storage position.

Top rollers 21when positioned on inclined surfaces 4 at',

1. Surfaces 4' are inclined sothat top rollers 2 are out:

of driven engagement with bottom roller 1 'when trun nions 3 abut lugs 7. The rollers `1 and 2 rotate in the. direction of the arrows shown in Figures 1, 2, 5 and 6.

AV thread guide 10 having a double eyelet is :fixed in the frame of the machine. There is one thread guide 10 forv each upper roller-2., A rod termed a guide stem 11 eXA tends the full length of the machine and is secured on op-V posite ends in the machine frame.

A shaft 12 extends the full length of the machine and is ro-tatively mounted in the machine frame. A pluralityy of stop motion 'segments 13 are loosely mounted ont shafts 12 in parallel alignment with top rollers 2 andi' thread guidesl 10. There is one stop motion segment 13? for each top roller 2.

Stop motion segments 13 are mounted to freely rotate or pivot upon shaft 12. Each stop motion segment 13 is mounted with its mass eccentrically disposed with respect to its pivot on shaft 12.

Each stop motion Vsegment 13 is provided with a coat.

segment 13 is provided with a thread guide 14 which hereinafter will be termed the second thread guide.

IIn operation, a thread or threads 9 coming from a source of supply (not shown)` passes through one of the double eyes of thread guide 10. The thread then passes to top roller 2 and partially around top roller 2 so as'to pass between top roller 2 and bottom roller 3, back to the other eye of double eyed thread guide 10. Thread 9 then passes to and partially around guide stem 11, throughV second thread guide 14 to the twisting spindle (not shown).

Each stop motion segment 13, as shown in Figure l, is held againstguide stem 11 by means of the tension on thread 9 passing from guide stem 11, through second thread guide 14 to the twisting spindle. Figure 1 therefore, depicts what might be termed the loaded position of stop motion segment 13.

Upon the breakage of thread 9, the effect of the tension of thread 9 upon second thread guide 14 is lost. Instantaneously stop motion segment 13, unloads or pivots upon shaft 12, gaining momentum as it pivots, falls or swings ltoward upper roller 2, so that stop motion segment 13 has enough momentum or force upon contacting upper roller 2 to cause trunnions 3 to roll along inclined surface 4 (downwardly) from a positon abutting outboard lug 6 to a position abutting inboard lug 7 and thereby cause upper roller 2 to disengage lower roller 1. The force of rotation of lower roller 1 willY assist in` moving upper roller 2 out of contact or engagement as theV center of upper roller 2 passes the center of lower roller 1 in moving from lug 6 to lug 7. The instantA upper roller 2 disengagesV lower roller 1, thread 9 is-no longer drawn away fromits source of supply. The frictional coating 15 on the periphery of stop motion segment 13 w is to be stopped, shaft 12 may be rotated thereby rotating clips 16, see Figure 4, from the full line to the dotted line position. As the twisting spindles come to a halt, the tension on thread 9 ceases and stop motion segment 13 tends to unload, as previously described. However,

.clips 16 will abut edges 21 provided at the base of under-v cuts 20, so that stop motion segments 13 are maintained in loaded position even though the tension on threadsy 9 ceases to exist.

Figure and 6 depict a moditied form of thread guide. Thread guide is provided with -a second thread guide eye 10'. The thread 9 passes through thread guide eye 10' so as to be directed to the bottom of lower roller 1. The. thread engages the left hand surface (as viewed in Figure 6) of lower roller 1 and then passes between rollers 1 and Z and around the right hand surface (as viewed in Figure 6) of upper roller 2 to the top of upper roller 2. From the top of upper roller Z the thread passes to guide stem 11, second thread guide 14 and the` twisting spindle (not shown).

The method of operation of stop motion segments 13 is identical to all gures illustrated regardless of the manner in which thread 9 engages the upper and lower rollers 2 and 1 respectively.

Having shown and described preferred embodiments of the present invention, by way of example, but realizing that structural changes could be made and other examples given without departing from either the spirit or scope of this invention, what I claim is:

1. In a twisting frame of the type having a driving lower roller and an upper slidingly mounted driven roller in driven contact with said driving lower roller, and a iirst thread guide iixed in the frame, that improvement in a stop motion consisting of a stop motion segment mounted for segmental rotation eccentrically with respect to its mass of weight and provided with an Veyelet, horizontal in normal thread guiding operating position, so that a thread to -be twisted passes through said rst thread guide and around said driven roller, back to said thread guide and then to said driven roller and over said stop motion segment and through said second mentioned thread guide, said thread holding said stop motion segment in counterbalanced position against its eccentrically loaded pivoted condition, whereby upon thread breakage said stop inotion segment pivots to abut said driven roller to move said roller from its position in operating contact with said.

driving roller to a position away from contact with said driving roller, thereby to stop said thread from feeding. 55

rail having an outboard lug and an inboard lug, with an. inclined surface inclining from said outboard lug tothat a thread to be twisted passes through said first thread guide and between said top roller and said lower roller and then over said guide sternI and through said second thread guide, holding said `stop motion segment in a counterbalanced position against its eccentrically loaded pivoted condition against said guide stem through the tension of the thread on said second thread guide, whereby upon thread breakage, said stop motion segment pivots to abut said driven top roller to move said roller fromits position in operating contact with said lower driving roller to -a position away from contact with said lower driving roller, thereby stop said thread from feeding, said outboard lugs dening the position of working engagement of said top rollers with said lower roller and said ward said inboard lug, said top rollers mounted for ro- Y tation through contact with said driving lower roller and said trunnions upon said inclined surface, a plurality of thread guides fixed in said frame, one thread guide in parallel alignment with a co-operating top roller, a guide stem extending the full length of the machine and secured in the frame, that improvement in a stop motion consisting of a shaft extending the full length of the frame and rotatively secured in the frame, a plurality of stop motion' inboard lugs dening the position of rest for said top rollers.

3. A claim is dened inA claim- 2 being further characf.

-motion segment in counterbalanced position upon loss.

of tension in said thread being twisted.

4. In a twisting frame of the type having a driving lower roller extending the full length of the frame, a"

plurality of top rollers, each having trunnions projecting from opposite sides, a plurality of fixed rails, two for each top roller, one on either side, lixed in the frame, each rail having an outboard Ilug dening the operative position of said top roller and `an inboard lug defining the inoperative position of said top roller, with an inclined surface, inclining from said outboard lug toward said inboard lug, said top rollers in operative position engaging to be driven by said driving lower roller with said trunnions rotating along said inclined surface from operative position against said outboard lug to inoperative position against said inboard lug, that improvement in a stop motion consisting of a plurality of tirst thread guides xed in the frame, one thread guide for each top roller, a guide stem extending the full length of the frame and ixed in the frame, a shaft extending the full length of the frame and rotatively secured in the frame, a plurality of stop motion segments, each provided with a second thread guide horizontal in normal operating position, one stop motion segment for each top roller, each stop motion segment mounted on said shaft in parallel alignment with the co-operating top roller 4and provided with a coating of friction creating material on the top roller contact surface of the segment, each stop motion segment mounted on said shaft for segmental rotation eccentrically with respect to its mass of weight so that a thread to be twisted passes through said first thread guide to and between said top and lower rollers to b e drawn thereby, passes over said guiide stem and through said second thread guide to retain said second thread guide in horizontal position and said segment against said guide stern to lhold said stop motion segment in counterbalanced position against its eccentrically References Cited in the tile of this patent UNITED STATES PATENTS 2,123,499 Camp July 12, 1938 Klein Oct. 29, 1957 

